Add 410 error code handling to REST client

- Add Gone exception which will raised if REST client hits
error code 410.
- Add unit tests for this exception.

Change-Id: I543fa80875d6de00845d5dc26bc07da2c1a7cd09

tempest_lib/common/rest_client.py

@@ -592,6 +592,7 @@ class RestClient(object):
         :raises Forbidden: If a 403 response code is received
         :raises NotFound: If a 404 response code is received
         :raises BadRequest: If a 400 response code is received
+        :raises Gone: If a 410 response code is received
         :raises Conflict: If a 409 response code is received
         :raises OverLimit: If a 413 response code is received and over_limit is
                           not in the response body
@@ -696,6 +697,11 @@ class RestClient(object):
                 resp_body = self._parse_resp(resp_body)
             raise exceptions.BadRequest(resp_body, resp=resp)
 
+        if resp.status == 410:
+            if parse_resp:
+                resp_body = self._parse_resp(resp_body)
+            raise exceptions.Gone(resp_body, resp=resp)
+
         if resp.status == 409:
             if parse_resp:
                 resp_body = self._parse_resp(resp_body)

tempest_lib/exceptions.py

@@ -115,6 +115,10 @@ class Conflict(ClientRestClientException):
     message = "An object with that identifier already exists"
 
 
+class Gone(ClientRestClientException):
+    message = "The requested resource is no longer available"
+
+
 class ResponseWithNonEmptyBody(OtherRestClientException):
     message = ("RFC Violation! Response with %(status)d HTTP Status Code "
                "MUST NOT have a body")

tempest_lib/tests/test_rest_client.py

@@ -330,6 +330,9 @@ class TestRestClientErrorCheckerJSON(base.TestCase):
     def test_response_409(self):
         self._test_error_checker(exceptions.Conflict, self.set_data("409"))
 
+    def test_response_410(self):
+        self._test_error_checker(exceptions.Gone, self.set_data("410"))
+
     def test_response_413(self):
         self._test_error_checker(exceptions.OverLimit, self.set_data("413"))
 
@@ -405,6 +408,25 @@ class TestRestClientErrorCheckerJSON(base.TestCase):
         expected = r_body
         self.assertEqual(expected, e.resp_body)
 
+    def test_response_410_with_dict(self):
+        r_body = '{"resp_body": {"err": "fake_resp_body"}}'
+        e = self._test_error_checker(exceptions.Gone,
+                                     self.set_data("410", r_body=r_body))
+
+        if self.c_type == 'application/json':
+            expected = {"err": "fake_resp_body"}
+        else:
+            expected = r_body
+        self.assertEqual(expected, e.resp_body)
+
+    def test_response_410_with_invalid_dict(self):
+        r_body = '{"foo": "bar"]'
+        e = self._test_error_checker(exceptions.Gone,
+                                     self.set_data("410", r_body=r_body))
+
+        expected = r_body
+        self.assertEqual(expected, e.resp_body)
+
     def test_response_409_with_dict(self):
         r_body = '{"resp_body": {"err": "fake_resp_body"}}'
         e = self._test_error_checker(exceptions.Conflict,